Clarendon Laboratory, University of Oxford Physics Department, Parks Road, Oxford OX1 3PU, UK.
Opt Lett. 2012 Jun 15;37(12):2415-7. doi: 10.1364/OL.37.002415.
A scheme for quasi-phase-matching high harmonic generation of circularly polarized radiation is proposed: optical rotation quasi-phase-matching (ORQPM). In ORQPM, propagation of the driving radiation in a system exhibiting circular birefringence causes its plane of polarization to rotate; by appropriately matching the period of rotation to the coherence length, it is possible to avoid destructive interference of the generated radiation. It is shown that ORQPM is approximately five times more efficient than conventional QPM, and half as efficient as true phase-matching.
光学旋转准相位匹配（ORQPM）。在 ORQPM 中，在具有圆双折射的系统中传播的驱动辐射会使其偏振面旋转；通过将旋转周期与相干长度适当匹配，可以避免生成辐射的相消干涉。结果表明，ORQPM 的效率大约比传统的 QPM 高 5 倍，比真正的相位匹配高一半。
